问题描述
我是 BlackBerry 编程的初学者，我需要在我的应用程序中将默认菜单(当您按下菜单按钮时)替换为自定义菜单，水平.最好的描述是我想要与黑莓 WeatherEye 应用程序相同的结果...
I'm a beginner in BlackBerry programming, I need to replace in my application the default menu (when you press the menu button) by a custom menu, horizontal. The best to describe is I want the same result as the WeatherEye application for BlackBerry...
替代文字 http://www.blackberrybing.com/resource/pics/201002/WeatherEye-OS-45.jpg
我知道如何创建默认菜单，但这个我不知道！谢谢，
I know how to create the default menu, but this one I have no idea!Thank you,
推荐答案
您需要做的是:
- 创建 SizebleVFManager (contentManager) 作为 VerticalFieldManager 的扩展
- 将显示宽度和高度 =(显示高度 - 菜单高度)大小设置为 contentManager
- 将 contentManager 添加到屏幕
- 创建 HorizontalFieldManager(菜单管理器)
- 创建 BitmapButtonField (menuButton) 作为 ButtonField 的扩展
- 将 FieldChangeListeners 设置为 menuButtons
- 将 menuButton 添加到 menuManager
- 将 menuManager 添加到屏幕
SizebleVFManager 示例:
Sample of SizebleVFManager :
class SizebleVFManager extends VerticalFieldManager
{
int mWidth = 0;
int mHeight = 0;
public SizebleVFM(int width, int height, long style) {
super(style);
mWidth = width;
mHeight = height;
}
public SizebleVFM(int width, int height) {
mWidth = width;
mHeight = height;
}
public int getPreferredWidth() {
return mWidth;
}
public int getPreferredHeight() {
return mHeight;
}
protected void sublayout(int width, int height) {
width = getPreferredWidth();
height = getPreferredHeight();
super.sublayout(width, height);
setExtent(width, height);
}
}
...
SizebleVFManager contentManager =
new SizebleVFManager(Display.getWidth(), Display.getHeight(),
VERTICAL_SCROLL|VERTICAL_SCROLLBAR);
PS 虽然使用标准菜单更好...
PS though its better to use standard menu...
更新
如果要禁用默认菜单功能，请取消 MENU 键:
If you want to disable default menu functionality, cancel MENU keydown:
protected boolean keyDown(int keycode, int time) {
if(Keypad.KEY_MENU == Keypad.key(keycode))
{
return true;
}
else
return super.keyDown(keycode, time);
}
更新
我已经安装了那个很棒的天气应用程序 并且我知道这个示例可能与几项改进:
I've installed that wonderful weather application and understood this sample may be more alike with several improvements:
- 使用 CyclicHFManager 作为 HorizontalFieldManager 的扩展
- 在菜单"按钮单击时显示/隐藏 menuManager
CyclicHFManager 是一个管理器，它将在视觉上将注意力集中在同一个地方，并循环运行所有字段.就像在 BlackBerry - 自定义中心循环 HorizontalFieldManager
CyclicHFManager is a manager which will keep focus on the same place visually and run all fields over, in cycle. Like in BlackBerry - Custom centered cyclic HorizontalFieldManager
class CyclicHFManager extends HorizontalFieldManager {
int mFocusedFieldIndex = 0;
boolean mCyclicTurnedOn = false;
public void focusChangeNotify(int arg0) {
super.focusChangeNotify(arg0);
if (mCyclicTurnedOn) {
int focusedFieldIndexNew = getFieldWithFocusIndex();
if (focusedFieldIndexNew != mFocusedFieldIndex) {
if (focusedFieldIndexNew - mFocusedFieldIndex > 0)
switchField(0, getFieldCount() - 1);
else
switchField(getFieldCount() - 1, 0);
}
}
else
{
mFocusedFieldIndex = getFieldWithFocusIndex();
}
}
private void switchField(int prevIndex, int newIndex) {
Field field = getField(prevIndex);
delete(field);
insert(field, newIndex);
}
}
替代文字 http://img109.imageshack.us/img109/6176/toolbarj.jpg
以及整个代码示例:
abstract class AScreen extends MainScreen {
boolean mMenuEnabled = false;
SizebleVFManager mContentManager = null;
CyclicHFManager mMenuManager = null;
public AScreen() {
mContentManager = new SizebleVFManager(Display.getWidth(), Display
.getHeight(), VERTICAL_SCROLL | VERTICAL_SCROLLBAR);
add(mContentManager);
// mMenuManager = new CyclicHFManager(Display.getWidth(), 60);
mMenuManager = new CyclicHFManager();
mMenuManager.setBorder(BorderFactory.createBevelBorder(new XYEdges(4,
0, 0, 0), new XYEdges(Color.DARKBLUE, 0, 0, 0), new XYEdges(
Color.WHITE, 0, 0, 0)));
mMenuManager.setBackground(BackgroundFactory
.createLinearGradientBackground(Color.DARKBLUE, Color.DARKBLUE,
Color.LIGHTBLUE, Color.LIGHTBLUE));
for (int i = 0; i < 10; i++) {
Bitmap nBitmap = new Bitmap(60, 60);
Graphics g = new Graphics(nBitmap);
g.setColor(Color.DARKBLUE);
g.fillRect(0, 0, 60, 60);
g.setColor(Color.WHITE);
g.drawRect(0, 0, 60, 60);
Font f = g.getFont().derive(Font.BOLD, 40);
g.setFont(f);
String text = String.valueOf(i);
g.drawText(text, (60 - f.getAdvance(text)) >> 1, (60 - f
.getHeight()) >> 1);
Bitmap fBitmap = new Bitmap(60, 60);
g = new Graphics(fBitmap);
g.setColor(Color.DARKBLUE);
g.fillRect(0, 0, 60, 60);
g.setColor(Color.GOLD);
g.drawRect(0, 0, 60, 60);
g.setFont(f);
g.drawText(text, (60 - f.getAdvance(text)) >> 1, (60 - f
.getHeight()) >> 1);
BitmapButtonField button = new BitmapButtonField(nBitmap, fBitmap,
fBitmap);
button.setCookie(String.valueOf(i));
button.setPadding(new XYEdges(0, 18, 0, 18));
button.setChangeListener(new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
Dialog.inform("Button # " + (String) field.getCookie());
}
});
mMenuManager.add(button);
}
}
protected boolean keyDown(int keycode, int time) {
if (Keypad.KEY_MENU == Keypad.key(keycode)) {
if (mMenuManager.getManager() != null) {
delete(mMenuManager);
mMenuManager.mCyclicTurnedOn = false;
mContentManager.updateSize(Display.getWidth(), Display
.getHeight());
} else {
add(mMenuManager);
mMenuManager.getField(2).setFocus();
mMenuManager.mCyclicTurnedOn = true;
mContentManager.updateSize(Display.getWidth(), Display
.getHeight()
- mMenuManager.getHeight());
}
return true;
} else
return super.keyDown(keycode, time);
}
}
class FirstScreen extends AScreen {
public FirstScreen() {
mContentManager.add(new LabelField("This is a first screen"));
}
}
public class ToolbarMenuApp extends UiApplication {
public ToolbarMenuApp() {
pushScreen(new FirstScreen());
}
public static void main(String[] args) {
(new ToolbarMenuApp()).enterEventDispatcher();
}
}
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